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Multipole subarray acoustic logging instrument and emission control circuit thereof

An array acoustic logging and launch control technology, which is used in seismology, wellbore/well components, and earth-moving drilling for logging records. And other issues

Active Publication Date: 2019-01-11
湖南率为控制科技有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0005] The main purpose of the present invention is to provide a transmission control circuit applied to a multi-pole subarray acoustic logging tool, aiming at solving the problem that the excitation signal generated by the transmission control circuit of the existing logging tool is single and the transmission power is fixed. The problem that the well tool cannot meet the more complex well formation measurement requirements

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  • Multipole subarray acoustic logging instrument and emission control circuit thereof
  • Multipole subarray acoustic logging instrument and emission control circuit thereof
  • Multipole subarray acoustic logging instrument and emission control circuit thereof

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Embodiment Construction

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, but cannot be construed as limitations to the present invention. Based on the embodiments in the present invention, those of ordinary skill in the art have no creative work All other embodiments obtained under the premise all belong to the protection scope of the present invention.

[0025] The present invention proposes a transmission control circuit applied to a multi-pole array acoustic logging tool, such as figure 1 As shown, the emission control circuit includes a control module 10, a high-voltage DC-DC module 20, a charging module 30 and a drive module 40, the control modu...

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Abstract

The invention discloses an emission control circuit applied to a multipole subarray acoustic logging instrument. The emission control circuit comprises a control module, a high-voltage DC-DC module, acharging module, and a driving module. The control module is connected with an upper computer and comprises an FPGA chip. The FPGA chip is respectively connected with the high-voltage DC-DC module, the charging module, and the driving module. The emission control circuit can realize the adjustment of the frequency of an excitation signal of a transmitting transducer and of transmitting power of the transmitting transducer at the same time, thereby having adjustability and flexibility to accommodate measurement requirements of different wellbores and various complex underlayers, and is very suitable for actual logging work.

Description

technical field [0001] The invention relates to the field of acoustic well logging, in particular to a multipole sub-array acoustic well logging instrument and its emission control circuit. Background technique [0002] The sound velocity of various wave modes in the wellbore is an extremely important parameter in petroleum exploration and development. The longitudinal and shear wave velocities and densities of rocks can be used to calculate rock elastic parameters (Young's modulus, bulk modulus, Poisson's ratio, etc.), inelastic parameters (uniaxial compressive strength, formation tension, etc.); The maximum and minimum principal stress of the formation; estimate the fracture pressure and collapse pressure; perform reservoir evaluation and productivity evaluation; estimate the elastic modulus of the fluid in the formation pores, so as to form pores that are independent of electrical methods and whose interpretation results do not depend on salinity Fluid identification met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/40E21B49/00
CPCE21B49/00G01V1/40
Inventor 高爽宋来亮
Owner 湖南率为控制科技有限公司
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